a^2-3a+2=0
D=(-3)^2-4*1*2=9-8=1
x1=3+1/2=4/2=2
x2=3-1/2=2/2=1
a^2-5a+6=0
D=(-5)^2-4*1*6=25-24=1
x1=5+1/2=6/2=3
x2=5-1/2=4/2=2
(x-2)(x-1)/(x-3)(x-2)=x-1/x-3
a^2-3a+2=0
D=(-3)^2-4*1*2=9-8=1
x1=3+1/2=4/2=2
x2=3-1/2=2/2=1
a^2-5a+6=0
D=(-5)^2-4*1*6=25-24=1
x1=5+1/2=6/2=3
x2=5-1/2=4/2=2
(x-2)(x-1)/(x-3)(x-2)=x-1/x-3